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What an expense ratio is
An expense ratio is the yearly cost of owning a fund, shown as a percentage of your invested amount. A fund with a 0.10 percent expense ratio charges roughly one dollar a year for every thousand dollars you have invested, while a 1.00 percent fund charges about ten.
The fee covers the fund's running costs, such as management, administration, and record keeping. It applies to index funds and actively managed funds alike, though the amounts can differ sharply between them.
How it is charged
You never receive a separate bill for an expense ratio. It is quietly deducted from the fund's assets over the course of the year, which slightly reduces the fund's return before it ever reaches you.
Because it comes out automatically, many investors do not notice it. That is exactly why it is worth checking before you buy. The fee is charged every year you hold the fund, in good markets and bad.
💡 It is charged whether the fund gains or loses:Unlike a performance fee, an expense ratio applies regardless of how the fund does. Even in a year the fund falls, you still pay the fee, which is one more reason low costs matter over a long holding period.
Why small differences matter
A fraction of a percent sounds trivial, but fees compound against you the same way returns compound for you. Over decades, the gap between a low-cost and a high-cost fund can add up to a large amount of money.
Consider an illustrative example of investing a sum for many years. A fund charging 1 percent a year rather than 0.05 percent could leave you with meaningfully less at the end, purely because more of your return was skimmed off each year. The numbers here are just an example, not a prediction.
| Fund type | Typical expense ratio range | Notes |
|---|---|---|
| Broad index fund | Very low, often near 0.03 to 0.20 percent | Aims to track a market cheaply |
| Actively managed fund | Higher, often around 0.50 to 1.00 percent or more | Pays managers to pick holdings |
| Specialty or niche fund | Can be higher still | Narrow focus, sometimes complex |
Illustrative ranges only. Always check a specific fund’s stated expense ratio.
What to look for
The expense ratio is listed in a fund's summary documents and on most brokerage pages, usually as a single percentage. Comparing it across similar funds is one of the simplest ways to keep more of your returns.
A higher fee is not automatically wrong, but it should come with a clear reason. For funds that simply track a broad market, low costs are widely regarded as one of the few reliable edges an investor can control.
Frequently asked questions
What is a good expense ratio?
For a broad index fund, expense ratios are often very low, sometimes near a few hundredths of a percent. Actively managed funds usually charge more. There is no single right number, but lower costs mean you keep more of your return, so many investors favor low-cost funds for core holdings.
How is an expense ratio charged?
It is deducted automatically from the fund’s assets throughout the year rather than billed to you directly. This slightly lowers the fund’s reported return, so you pay it without ever seeing a separate charge. It applies every year you hold the fund.
Why does a small expense ratio matter so much?
Because fees compound over time just as returns do. A difference of even one percent a year can add up to a large sum over decades, since each year a bigger slice of your return is taken. Over a long horizon, costs are one of the biggest factors you can actually control.
Where do I find a fund’s expense ratio?
It is shown in the fund’s summary prospectus and fact sheet, and on most brokerage and fund pages, usually as a single percentage. Comparing this number across similar funds is a quick way to spot which ones are cheaper to own.
Related tools and pages
These are for learning. Any calculator here shows example scenarios, not predictions of future prices.
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